5. Lycop erd on australe (Berk.) ; sessile, radicans, globoso-depressum, minute aculcato-verruco-
sum, glabrescens, strato sterili parvo 1. obsoleto, sporis capillitioque nmbrinis, ore demum conico aperto.
H a b . On the ground, J. B . E ., Gunn.
This was sent uuder the same numbei- with L. glabrescens, which it much resembles, but the ban-cu stratum is
small or obsolete, and if present diflereutly coloured. The spores are not pedunculate, aud ai-e rather smaller.
Gen. XL. SCLERODERMA, B.
PerirUim firmum, irregulariter 1. stellatim debiscens. Flood peiidio undique adnati, vacuolis immixtis
minutis in quibus glomeruli sporarum apicibus floccotum oriuudarum absque peridiolo nidulautur.
Resembling Trafiles, especially when growing in sand, but differing veiy materially in structure, (Name from
o-kXt/pos, hard, and Beppa, skin.)
1. Sclerode rma G eä ste r (Er. Syst. Myc. p. 46).
H a b . Ou the ground, Archer.
Gen. XLI. MITREMYCES, Nees.
Peiidium externum, coineum, ore determinato dentibus squamæformibus coloratis clauso, velum rup-
tum cartilagiueum ; interius sacciforme, discretum, minutum, ex ore suspensum.
A veiy curious genus of plants, occurring in the United States, the Himalayas, etc., but not in Europe. (Name
from /xtTpa. a bonnet, and /tr/o;?, afmgiis; in idlusion to the calyptrifom deciduous veil.)
1. M itr em y ces fu scu s (Berk, in Ann. Nat. Hist. iii. p. 325).
H a b . On the ground, Gunn, Archer, etc.
Gen. X L II. MESOPHELLIA, Berk.
Peridium crassum, coriaceum, substratosum, capillitium fasciculato-anastomosans ad columellam centralem
suberosam radians. Flocci fiexuosi. Spora breviter fusiformes, utrinque obtusiuscula?.— Genus
Cychdermati, Klotzsch, affine. Species unica hypogoea.
(Name from ptecroç, middle, and «^leXXos, cork)
1. M e so p h e llia arenaria (Berk, in Linn. Tr. xxii. p. 131. t. 25 C).
H a b . In the sandy soil, Archer.
Froi^ f -1 inch across, elliptic, somewhat depressed, subterraneous, clothed externally with white flocci, which
attach themselves to little grain? of sand. After the external down has been removed, in old specimens dark
branched veins are seen to ran o«er the peridium, without however giring off free bundles of threads, as in Hystero-
myces. Peridium single, coriaceous, apparently consisting of several closely compacted strata, like wasp pasteboard.
Flocci pinkish-gi'ey, radiating in little fascicles from the peridium to the large central corky columella. Spores fusiform,
short, slightly obtuse at either end, .ggVô d an inch long, of the same colour as the flocci.
This genus approaches close to Cycloderma, Klotzsch, but there is no inner peridium ; the columella is not
attached, and the spores are fusifojm instead of globose. It is a most interesting addition to Fungi, and, like
Cycloderma, connects Trichogastres with Myxogaslres. The early condition of the plant is however quite unknown.
The colour of the spores reminds one of Jjycogala, and the veins of the peridium of Ilysteromyces.
Gen. X L III. ÆTIIALIUM, LI.
Peridium indeterminatum, membranoso-cellulare, fragile, fatiscens, extus strato
coTticatum, intus e floccis in strata membranacea eoalitis cellulosum.
fioccoso evanescente
The only species is universally distributed, aud is the pest of hothouses, from its abundant dusty spores. (Name
from atiaXij, soot)
1. Æth alium septicum (Er. Syst. iii. p. 93).
H a b . Amongst fallen leaves, Gunn.
Gen. XLIV. DIDERMA, Pers.
Peridium duplex, exterius crustaceum, discretum, glabrum, fragile, dehiscens ; interius tenerrimum,
membranaceum, evanescens. Flocci vagi, versus basin adnati, aut sæpius columellæ affixi interque sporas
compactas repentes, raro latentes.
The only Tasmanian species in the collection is one of the commonest European forms. Probably others will
reward future researches. (Name from Sts, double, and Beppa, a skin)
1. Diderma vernicosum (Pers. Syn. p. 165).
Hab. On sticks. Archer.
Gen. XLV. DIDYMIUSI, Schrad.
Peridium membranaceum, tenue, irregulariter dehiscens aut fatiscens, tectum cortice (peridio exteruo
non discreto) adnato in squamulas furfuraceas aut villum farinosum mox fatiscente. Flocci vagi, peridio
adnati, inter sporas repentes.
Here again we have one of the commonest European forms. (Name from SiBvpos, double)
1. Didymium costatum (Fr. Syst. Myc. iii. p. 118).
H a b . On sticks, moss, etc.. Archer.
The stem is longer than in the state described by Fries, and the peridium umbilicate. Columella white ;
JlQcci dark.
Gen. XLYI. PHYSARUM, Pers.
Peridium simplex, membranaceum, nudum, irregulariter dehiscens. Columella nulla. Spora iioccis
peridio adnatis intertextæ.
The perfect, simple, delicate peridium, combiued with the absence of a colmnella, at once characterize tliis
geuus. The Tasmauian represeutatives are altogether European. (Name from ^vcraw, to puff up)
1. Physarum nutans (Pers. Syn. p. 203).
H a b . On Sterea, etc., Archei-.
Peridium white. Stem tawny.
2. Physarum hyalinum (Pers. Syn. p. 170).
H a b . On moss, etc.. Archer.
The peridium is globose, and the steins pale, but of the same nature as those of P. hyalinum, though agreeing
in colom with those of P. utricidare. The two species are probably mere forms of one. I have, in fact, uiuloubteil
P. hyalinum, from Fries, marked P. utriculare. Both belong to the genus Badkamia, should it be found tliat it is
really distinct from Physarum, or, iu other words, if Physarum has ever solitaiy spores.
Gen. XLYII. CRATERIUM, Treiiiepohl.
Peridium simplex, operculatum. Capillitium e iloceis subloculosum.